"If someone were to discover, for instance, that under hitherto unobserved circumstances stones were able to speak, it would take only a few pages to describe and explain so earth-shattering a phenomenon. On the other hand, one can always write yet another book about positive thinking, and this is far from being of only academic interest, since it involves a method that makes it impossible ever to arrive at a clear resolution of life's most important questions. Human activities might be graded by the quantity of words required: the more words, the worse their character. All the knowledge that has led our species from wearing animal skins to people flying, complete with proofs, would fill a handful of reference books, but a bookcase the size of the earth would not suffice to hold all the rest, quite apart from the vast discussions that are conducted not with the pen but with the sword and chains. The thought suggests itself that we carry on our human business in a most irrational manner when we do not use those methods by which the exact sciences have forged ahead in such exemplary fashion."